Entropy - learning decision trees, Computer Engineering

Assignment Help:

Entropy - learning decision trees:

Through putting together a decision of tree is all a matter of choosing that attribute to test at each node in the tree. Further we shall define a measure that is information gain that will be used to decide which attribute to test at each node. By considering through information gain is itself calculated utilising a measure called entropy that we first define for the case of a binary decision problem so then define for the general case. 

As per given a binary categorisation like C, and a set of examples, S, that are utilising the proportion of examples categorised as positive by C is p+  or the proportion of examples categorised  like negative by C is p-, then the entropy of S is as: 

641_Entropy - learning decision trees.png

Now next here instantly we defined entropy first for a binary decision problem is easier to get an impression of what it is trying to calculate. As Tom Mitchell puts this quite well: like 

"In order to define an information gain precisely so we begin by defining a measure commonly utilising in information theory that is called entropy in which characterizes the (im)purity of as an arbitrary collection of examples."


Related Discussions:- Entropy - learning decision trees

State the encryption and decryption process with example, State the Encrypt...

State the Encryption and decryption process with example Encryption and decryption process in the Figure where Ram wants to send a confidential message to his friend Shyam. Ram

Discuss the csma/cd and csma/ca protocols, Discuss the CSMA/CD and CSMA/CA ...

Discuss the CSMA/CD and CSMA/CA protocols. CSMA/CD: this is an access method used mainly with LANs configured in a bus topology. Along with CSMA/CD, any station (node) can se

Define deadlock with resource request and allocation graph, Define Deadlock...

Define Deadlock with Resource request and allocation graph (RRAG) Deadlocks can be described through a directed bipartite graph termed as a RRAG that is Resource Request All

How to clear computer motherboard cmos password, As CMOS is a special chip ...

As CMOS is a special chip with its own battery, the best way to clear out a CMOS chip is to cut off it from its power supply. To clear the CMOS password you just take away the

How does the xml serializer work, How does the Xml Serializer work?  What A...

How does the Xml Serializer work?  What ACL permissions does a process using it require?   Xml Serializer needs write permission to the system's TEMP directory.

Elucidate in brief the functions of the clock generator chip, Elucidate in ...

Elucidate in brief the functions of the clock generator chip, 8284. 8284 Clock generator: 8284 is an ancillary component to the microprocessors. Without clock generator, many

Define the term ''turn-around'', The "turn-around" time of a user job is th...

The "turn-around" time of a user job is the? Ans. Total time taken to execute the job is called "turn around" time.

Draw the logic diagram of 4-bit twisted ring counters, Draw the logic diagr...

Draw the logic diagram of 4-bit Twisted Ring counters and explain its operation with the help of timing diagram. Ans: Twisted ring counter (4 BIT): We ready know that shi

What is dispatch unit, What is dispatch unit? A separate unit which we ...

What is dispatch unit? A separate unit which we call the dispatch unit fetch instructions from the front of the queue and sends them to the execution unit. The dispatch unit al

Develop an object-oriented design, Investigate the MIPS programmers model a...

Investigate the MIPS programmers model and develop an object-oriented design that will reflect aspects of the MIPS architecture. Consider the functional units of the architecture a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd